Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 284 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
4. 4.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
6. 6.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the bench (d) on the blackboard
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) yeast (d) coins as the load
9. 9.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
10. 10.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a battery cell (d) a small paper cup
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) a pencil (d) string
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
15. 15.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a magnet (d) string
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
18. 18.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚙️ Which of these is an inclined plane? (a) a ramp (b) a flagpole (c) a bottle opener (d) a spoon lifting a lid
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a battery cell (d) string
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) the same string (d) how hard we must pull
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) coins as the load (d) a magnet
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) an empty thread reel (d) yeast
25. 25.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) turmeric powder
27. 27.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a crane (d) a sloping road
28. 28.⚙️ Which of these is a lever? (a) a crowbar (b) a slide (c) a flagpole (d) a well pulley
29. 29.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a mirror (d) coins as the load
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same string
34. 34.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a balloon (d) a pencil
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.True or false: string is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a balloon
40. 40.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False

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